What is the main structure of the heart wall, so what is the function of the heart?

The heart has the endocardium from the inside to the outside, the subintima, the myocardium, the epicardium, and the pericardium outside the adventitia. Functions include: contraction, autodiscipline, conduction, and excitability.

The heart wall is made up of three membranes: the endocardium, myocardium, and epicardium. The surface of the endocardium is endothelial cells that connect to the vascular endothelium. Subendothelium is the subendothelial layer that contains a bit of smooth muscle in addition to connective tissue.

Between the subcutaneous layer and the myocardium is the subendocardial layer, which consists of looser connective tissue that contains blood vessels and nerves. The subendocardial layer of the ventricles also has branches of the cardiac conduction system.

The heart wall is made up mainly of connective tissue. Its function is similar to that of connective tissue, mainly to support protection.

The heart is the power organ of blood circulation, and the walls of the heart are mainly composed of myocardium (a type of muscle tissue), which is able to contract and relax, thus providing power for blood circulation; It can be seen that the heart is mainly composed of muscle tissue, which is compatible with its function of providing power for blood circulation, so the answer is: muscle tissue; Shrink.

The heart wall is mainly made up of muscle tissue.

The heart wall is composed of the intracardial membrane, the myocardial layer and the epicardium from the inside to the outside, and the myocardial layer is the main part of the DAO wall. The three-layer intra-junction structure of the heart wall corresponds to the three-layer membrane connecting the large blood vessels connecting the heart.

The walls of the atrial and ventricles, as well as the aortic and pulmonary artery initiations, are attached to the fibrous scaffolds of the heart.

The fiber stent connects these parts and provides attachment sites for the atrioventricular valve and the main and pulmonary valves, and acts as a mechanical fulcrum during the contraction and relaxation of the myocardium and the opening and closing of the valve.

Ultrasound showed that the liver COPY was increased in size, full in shape, thickened in the capsule and fine corrugated, echo diffusely enhanced, thickened, and fine corrugated, the portal vein thickened, and the spleen thickness increased. Pathologic findings suggest small nodular cirrhosis with more or less alcoholic vitreous humor visible. Liver tissue pathology of liver cirrhosis after alcoholic fatty liver disease shows hepatic steatosis, fibrous tissue septum is connected to the lobular ** vein and manifold area, and the liver lobules are separated, and this type of cirrhosis is mostly small nodular type.

The heart wall is composed of three membranes, from the inside to the outside, followed by the endocardium, the myocardium, and the epicardium.

1 The endocardium is endothelial on the surface of the endocardium, which is connected to the endothelium of blood vessels.

The subendothelial layer is the subendothelial layer, and its macro eggplant contains a little smooth muscle in addition to connective tissue.

Between the subcutaneous layer and the myocardial membrane is the subendocardiallayer, which consists of loose connective tissue containing blood vessels and nerves.

The subendocardial layer of the ventricles also has branches of the cardiac conduction system.

2 Myocardium The myocardium is mainly composed of myocardium, the myocardium of the atrium is thin, the myocardium of the ventricle is thick, and the left ventricle is the thickest.

The myocardial fibers are arranged in a spiral pattern, which can be roughly divided into three layers: medial longitudinal, median and external oblique.

There are many myocardial fibers ** in bundles, and there are more connective tissue and abundant capillaries between the muscle fascicles.

3 Epicardium The epicardium is the visceral layer of the pericardium, which is structured as a serou **embrane, its surface layer is mesothelium, and below the mesothelium is a thin layer of connective tissue that connects to the myocardial membrane (Fig. 8-14).

The epicardium contains blood vessels and nerves, and often adipose tissue.

The pericardial parietal layer is lined with the inner surface of the pericardium, which is also serosa and is continuous with the epicardium.

There is a small amount of fluid in the cavity between the wall layer and the visceral layer, so that the wall layer and the visceral layer are moist and smooth, which is conducive to heart beating.

From the perspective of the function of the heart, the main tissues that make up the heart are muscle tissue.

The heart is composed of myocardium, the left atrium, the left ventricle, the right atrium, and the right ventricle, of which the left ventricular wall is the thickest, and these four chambers are the only way for the systemic circulation and pulmonary circulation.

The heart is a hollow muscular organ with four chambers: the posterior upper part is the left atrium and the right atrium, separated by an atrial septum; The anterior lower part is the left ventricle and the right ventricle, and the interval between the two is a ventricular septum. Normally, due to the separation of the atrioventricular and ventricular septum, the left and right hemispheres do not communicate directly, but each atria can lead to the ipsilateral ventricle through the atrioventricular opening.

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Regarding the structure of the heart wall, the correct statement is ().

a.It consists of the subendocardium, myocardium, and epicardium.

b.It consists of the endocardium, myocardial layer, and epicardium.

c.Failure is composed of the endocardium, myocardial layer, and epicardium.

d.It is composed of the subendothelial layer, myocardial layer, and epicardial tan.

Correct answer: B